Why does the U.S. have troops in South Korea?

A groundbreaking diplomatic event — the planned summit on June 12 between North Korea’s Kim Jong Un and President Donald Trump — may be in jeopardy. The actions of U.S. troops in South Korea are at the center of that conflict.

North Korea’s official Central News Agency stated that...

Amazon is reportedly looking for people who are willing to have their bodies scanned in 3D in order to track and measure subtle changes in their sizes and shapes. It’s part of the company’s broader push to sell more clothes by more accurately predicting how garments will fit...

On May 6, the “All of Us” study started enrolling participants. This national study will be one of the largest ever examining the connection between genetics, behavior and medical outcomes, with a goal of 1 million or more participants. Anyone over the age of 18 in the U.S. can...

Cases of vector-borne disease have more than doubled in the U.S. since 2004, the Centers for Disease Control and Prevention recently reported, with mosquitoes and ticks bearing most of the blame.

Mosquitoes, long spreaders of malaria and yellow fever, have more recently spread...

School shootings like the one that took place in Santa Fe, Texas, on May 18 are often followed by calls for enhanced security measures.

But Santa Fe High School already had many of these...

A well-worn joke in American Jewish culture goes like this. A Jewish immigrant landed at Ellis Island in New York. The procedures were confusing, and he was overwhelmed by the commotion. When one of the officials asked him “What is your name?” he...

Ammonia, with its unmistakable urinous odor, is a critical ingredient in agricultural fertilizers. With more than 145 million tonnes manufactured annually, only sulfuric acid outranks it as the world’s most produced...

Last month, law enforcement in California apprehended the alleged Golden State Killer, a serial murderer and rapist who terrorized the state during the 70s and 80s. Investigators triangulated to a suspect using a combination...

Ammonia, with its unmistakable urinous odor, is a critical ingredient in agricultural fertilizers. With more than 145 million tonnes manufactured annually, only sulfuric acid outranks it as the world’s most produced...

President Donald Trump has demanded China cut its trade deficit with the U.S. by US$200 billion by 2020 or face a host of punishing tariffs. After recent talks with the U.S., China agreed to reduce it but wouldn’t commit to a target.

Regardless, my research in international economics tells me that meeting Trump’s demand is implausible....